Fig. 1

Immunohistochemical staining of aldehyde dehydrogenase 1 (ALDH1) in breast tumor cells. a Essentially all of the tumor cells are positive for ALDH1. b No ALDH1-positive cells are present
Immunohistochemical staining of aldehyde dehydrogenase 1 (ALDH1) in breast tumor cells. a Essentially all of the tumor cells are positive for ALDH1. b No ALDH1-positive cells are present